#!/usr/bin/perl -w
# SPDX-License-Identifier: GPL-2.0
#
# kabisyms - a script tools to generate kabi baseline and check symbol
#            referance relationship.
#
# Author: Xie XiuQi <xiexiuqi@huawei.com>
# Copyright (C) 2019 Huawei, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# General Public License (GPL).
#
# usage:
#   ./scripts/kabisyms -k <symlist> -s <symvers> -o <output>
#   ./scripts/kabisyms -k <symlist> -d <kabideps> -o <output>

use 5.010;

use strict;
use Getopt::Long;
use File::Basename;

my $SYMLIST;
my $SYMVERS;
my $KABIDEPS;
my $OUTPUT = "Module.kabi";
my $VERBOSE;

my $PROG = basename $0;

sub usage {
	say "usage:";
	say "  $PROG [--symlist|k] [--symvers|s] [--kabideps|d] [--output|o] [--verbose|v] [--help|h|?]";
	say "    -k|--symlist";
	say "      symbol list (filename)";
	say "    -s|--symvers";
	say "      Module.symvers";
	say "    -d|--kabideps";
	say "      kabideps";
	say "    -o|--output";
	say "      filename of output";
	say "    -v|--verbose:";
	say "      show more info";
	say "    -h|-?|--help:";
	say "      show this usage";
	say "  examples:";
	say "   ./scripts/kabisyms -k <symlist> -s <symvers> -o <output>";
	say "   ./scripts/kabisyms -k <symlist> -d <kabideps> -o <output>";
	exit 0;
}

usage() unless (@ARGV);
my $result = GetOptions(
	'symlist|k=s'   =>      \$SYMLIST,
	'symvers|s=s'   =>      \$SYMVERS,
	'kabideps|d=s'  =>      \$KABIDEPS,
	'output|o=s'    =>      \$OUTPUT,
	'verbose|v!'    =>      \$VERBOSE,
	'help|h|?'      =>      \&usage,
) or usage();

my @syms;
my @symvers;
my @kabideps;

if ($SYMLIST) {
	@syms = `cat $SYMLIST`; chomp @syms;
}
else {
	usage();
}

if ($SYMVERS) {
	@symvers = `cat $SYMVERS`; chomp @symvers;
}
elsif ($KABIDEPS) {
	@kabideps = `cat $KABIDEPS`; chomp @kabideps;
}
else {
	usage();
}

sub check_sym {
	my $sym = shift;
	my @res;
	my $found;

	foreach (@symvers) {
		if (/^\s*$/) {
			next;
		}

		if (/^0x[0-9a-fA-F]+\s+$sym\s+/) {
			printf OUT "%s\n", $_;
			$found = 1;
			last;
		}
	}

	printf "%s is not included in %s\n", $sym, $SYMVERS if (!$found);
}

sub check_deps {
	my $sym = shift;
	my @res;
	my $found;

	foreach (@kabideps) {
		if (/^\s*$/) {
			next;
		}

		if (/^\s*$sym:/) {
			printf OUT "%s\n", $_;
			$found = 1;
			last;
		}
	}

	printf "%s is not included in %s\n", $sym, $KABIDEPS if (!$found);
}

my $output = $OUTPUT;

open(OUT, ">", "$output")
     || die "can't open >$output : $!";

my $total = @syms;
my $count;
for (@syms) {
	if ($SYMVERS) {
		check_sym($_);
	}
	elsif ($KABIDEPS) {
		check_deps($_);
	}
	printf "\r%d/%d", ++$count, $total if ($VERBOSE);
}
printf "output to %s\n", $OUTPUT;

close OUT;